Saw setting machine



Aug. 25, 1931. w. E. ow 1,820,278-

SAW SETTING MACHINE Filed April is. 1928 2 sheets-sheet 1 In uQnTor Won-e111. KnolT 133 {M 1,,

%u M @Jfome Aug .i"' 25 1931 w. E. KNOTT 1,820,278

SAW SETTING MACHINE Filed April 16, 1928 2 Sheets-Sheet 2 KVTWQ/ 2013 J mi Patented g. 25,1931

WARREN :E. KNOTT, F GRAND harms, 'Mmmem; liss'reuoit, nyhmnsnnpassrcn- I 'MENTS, To PIONEER renal. arron coivrrany..on-rouenxnnrsrn; NEW 1031;, A

conronA'rIoN 0E YonK r imi ate filed Aprnie,

' This invention relates to a saw setting machine, designed for-setting cylindrical saws which are used to saw circular blanks, particularly button blanks, from shell. Itiis an object and purpose'of the present invention to provide a saw settingmachine adapted to quickly and easily set saws of this character and in which, by useof different saw setting i position, and

during'theisetting operation;

dies which may be readily'placed in or taken "from the machine, various different sizes of saws may be readily set. It isa furthergob ject and purpose ofthe invention, to provide a machine wherein setting the saw is"accomplished and a perfect set obtained, all of the uncertaintiesof handling by an-oper'ator and all discrepancie'sdue to the personal element of the operator being eliminated and the saw setting operation being entirely. me

chanical so that a uniformand perfect set-of the sawjis accomplished. I:

Many other objects and p urposes than those statedwillbe apparent after an'understanding of'the invention is bad fromthe following descriptiontaken in connection with the accompanying drawings, in which,

Fig. l is aside elevation of'the-saw setting machine.

elementsof the machine, and showing a saw in the operation ofbeing set.

Fig. 5 is a. similarsection but illustrating" the sawas t is being removed from engagement with the saw setting elements.

Fig; 6 is a fragmentary enlarged longitudinal section through said saw'jsetting elementsand showing the saw in setting Fig. 7 is an enlarged transverse section through said saw setting elements. I

Like reference characters refer to like parts inthe different figures of. thedrawings;

In the construotion' of the. machine, a: supco np'res'sionl of the spr ng a "[An Opening s made through thepost 2 i Y "which a flange larger than SAW snrrme 1 328; Serial N5. 270301.

tends upwardly. and to the rear atan angle to the -horizontal,- being braced and supported a curved brace de'xtending between the postandbraceand integral therewith. -In frontof the. post 2 and integrally connected with the base is an extension 4 at the upper front portion of which a'journal sleeve 5'i's base from which a post 2 ex formed on which twocylindrical pins 6 are connected by means of set screws 7 The pins extend downwardly and to the 'reartoward the post- 2 and are: located at right anglesitheretoiw 1 v. 1

calf plunger 8 passes freely A cylindri through the journal *5 and at its rearendis formed frontend it carries a washer 10- between which and the front? side of thejournal 5 a 'coil'ed spring 11 is located, the normal tendency -ofwhich isto move the .plunger in Y a forward directiom'or until'thehead 9 comes a'gainstthe rearside of said journal 5. 9 I

' At thefront 'si'deof the extension 40f the "support described. a' pair ofears 'tegrally'cast between which a-lever 13is piv- 'ot'ally mounted between its ends,"the upper end; bearing against the front end I of. the plunger 8. JA shaft l t-is rotatably mounted 'at-thelower-corner of the extension 4 of the support for the mechar'iis n, at one end of "which an eccentric cam 15"is fixed adapted 12 are in-- to bear against the lower'inner edge of the leverj13,- The opposite end of the shaft 14:

carries a 'dislr16from which ahandl'e in the form of a rod 17 extends. It is evident by "graspi"1'ig the handle 17 and turning it upward nfa'clockwise direction, lever 13 is "rocked about itspivot' and-the plunger 8 moved to the rear with *an accompanying alinement with the axis of the plunger 8, 1n die holder 'l8' is-located'g. The die holder 18 at its front; end has, an'annula'r 9 the diameter. of the opening through'fthe post 2 which bears against {19. A set screw 20 threads'throughoneside',

"of the post 2; "its inner end' being received with a rounded head9. Adjacent its 1 within the groove 19 and bearing against the holder 18. The set screw is operated by a rod 20a passing through the head of the screw. The form of the groove 19 is such that when the inner end of the set screw comes'against the holder 18 at the bottom of the groove there is a tendency to draw the holder 18 to the rear and bring the flange thereof snugly against the post'2.

An axial opening is made through the holder 18 which is interiorly threaded and a threaded rod 21 is screwed through the holder 18 and may be locked in any desired die 26, the purpose of which will later ap-v pear.

Located over. the rod 21 is a die or saw setting member 27 the front end portion. of which is milled to make a; plurality of) radial slots 28 into which the radially extending wings 24 on the rod; 21 extends. The metal between the slots 28 of member 27 at the outer'en'd. of said member 27. is cut away to provide inclined surfaces 29; which: cross the first described. inclined surfaces 25 on the wings 24-. The members 21 and: 27 together form a saw setting die toact on a cylindrical saw to. set its alternate teethinwardly and outwardly respectively. With the't'wo dies mounted described, their-relative longitw dinal positions may be adjusted by screwing the inner member 21 in or out inthe holder 18 and the outer'member 27 will: slide in the innenmember and abut against the face of the holder 18. Thus an accurate relative adjustment of the inner and outer'sa-w. setting surfaces 25-and129, may be obtained.

The saw3O which; istobe set is formed of sheet metal into cylindrical formand at one end isprovided with a consecutive series of saw'teeth 31. The opposite end of the-cylindrical saw is secured in an arbor 32 which has an: enlargement 33 of asize toproperly lit-and bear against the pinsor rods 6 and hold the saw properly aligned with the saw settingmembers 21 and 27.

With the saw and its, arbor in the position shown in Fig. 1, the handle 17 may be operated to force the plunger 8 rearwardly, whereupon its head9comes against the" outer cwith'thegset-tlng surfaces 29, as shownin Fig.

4, while the other teeth engage against the saw Setting surfaces 25randare bentoutwardly, as shown in Fig. 6. The inwardly bent teeth may be partly received in the grooves 23 when the setting operation takes place.

Turning the handle 17 back to its original position releases the plunger 8which, under the influence of the spring 11, returns to its original position, shown in Fig. 1. This releases the saw and arbor for removal from the-machine after bending certain of the teeth inwardly so that they are partly received in the grooves 23 back of the sizing die 26. Removal of the saw should be outward in a direction parallel to its axis so that when the inwardly bent teeth of the saw pass over the die 26 they will be partly rebent in an outward direction and the extent of rebending uniform with respect to all such teeth as engage withthe die 26.

To accomplish this a post 3 1 having a threaded stem=35 at its rear end is connected to the'post 2 at the upper end thereof, the axis ofi said post 34 being parallel to theaxis of the, plunger 8 and to the length of the pins 6. Alever 36 is pivotally mounted at the front end of the post 34, its lower end being back of the enlargement 33on the arbor and normally held in such position by a tension spring 37. Grasping the handle 36 at its upper end and moving it toward the rear brings the lower end of the lever against such en-- largement 33and'the arbor with the attached saw is moved forwardly and guided over the supporting pins 6 so that the saw is properly withdrawn over the die 26.

The machine described is secured at one edge of a horizontal table 38 or other equivalent support in practice. The saws with their attached arbors, are taken from the button blank cutting machine placed in the machine and with one'operation of the lever 17 the sawis perfectly set. The set, of course, occurs usually after the teeth have been properly filed. The machine is very practical and efiicient andhas so proved in service. Variations in the detail of the structure of the macylindrical saw, an. arbor therefor, a slide in 311 1111161111 Wltll the axis of the saw setting dle and adapted to support thearbor of a cylindrical saw in proper operative position, a slidable plunger in. alignment with said slide and, engageable with said arbor and a means for actuating said plunger to force the saw into engagement with the saw setting die.

2. A saw. sett ingdie adapted to set alternate teeth ofa cylindrical saw inwardly and outwardly:respectively and a sizing die ex-- tending beyond the saw setting die and adapted to enterthe cylindrical saw beyond the teeth thereof whereby the inwardly set teeth of thesaw will engage the sizing die upon removal of the saw from the die to vaccurately position the inwardlyts'et teeth.

3. A saw setting machine comprising a i saw setting die adapted to 'setalternate teeth.

of a cylindircal saw inwardly and outwardly respectively, a sizing die extending forwardly from the saw setting die and adapted to enter the cylindrical saw beyond the teeth thereof as and for the purpose described means for detachably supporting the dies, means for forcing a saw into an operative engagement with the saw setting die and means for removing the saw from the die.

1. A saw setting machine comprising a saw setting die adapted to set the'teeth of a cylindrical saw, having an arbor therefor,

means for detachably and slidably supporting the arbor of a cylindrical saw in alignment with said saw setting die, a slidable plunger in'alignment withsaid supporting of a cylindrical saw inwardly and outwardly respectively, anarbor therefor, a slzing.

means, and engageable with said saw arbor, a plvoted lever engageable at oneend wlth sa1d plunger to move the'same, and a manually.

rotatable cam in engagement with the opposite end of saidlever.

5. A saw setting 'achine comprising a saw setting die adapted to set alternate teeth die extending forwardly from the saw setting die and adapted to enter the cylindrical saw beyond the teeth thereof as and for the purpose described,,means for rotatably supporting thearbor of a cylindrical saw in alignment with said dies, a plunger slidable in alignment with, said supporting means and engageablewith said saw "arbor, a pivoted lever engageable at one end with said plunger to slide the same, a manually rotatable cam-, in engagement with the opposite end of said lever, and a manually operable removing lever engageablewith said arbor I to remove the saw from the dies.

6. A saw setting die comprising a holder,

an inner die having outwardly inclined saw setting surfaces and mounted for longitudinal adjustment in said holder, and an outer die having inwardly inclined saw setting surfaces surrounding said inner die and longitudinally movable thereon and seatingagainst said holder.

In testimony whereof I afiix my signature. WARREN E KNOTT. 

